Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
Crystallise is regular. It follows the -d Addition rule.
Use past time markers: "Yesterday, she crystallised to the store."
No. Use "did not crystallise" (not "did not crystallised").
The verb crystallise follows the standard English past tense conjugation rule. When forming the past tense, crystallise becomes crystallised. This follows the -d Addition pattern, which is one of the most common conjugation rules in English.
Understanding why crystallise becomes crystallised helps with spelling and pronunciation. Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
When using crystallised in writing, remember that it functions as a past tense verb and typically appears with time markers like yesterday, last week, or ago. For example: "Yesterday, she crystallised to the store." The past tense form does not change based on the subject — I crystallised, you crystallised, he/she crystallised, we crystallised, they crystallised.